/*
 * Copyright (c) 2002-2009 Moxie Marlinspike
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#define BOOST_SYSTEM_NO_DEPRECATED

#ifndef __SSL_BRIDGE_H__
#define __SSL_BRIDGE_H__

#include <boost/asio.hpp>
#include <boost/shared_ptr.hpp>

#include <openssl/pem.h>
#include <openssl/conf.h>
#include <openssl/x509v3.h>
#include <openssl/ssl.h>
#include <openssl/err.h>

#include <sys/poll.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <list>
#include <map>

#include "util/Util.hpp"
#include "certificate/Certificate.hpp"
#include "certificate/CertificateManager.hpp"

#include "SessionCache.hpp"
#include "Logger.hpp"

using namespace boost::asio;

class SSLConnectionError : public std::exception
{
public:
	virtual const char* what() const throw()
	{
		return "Error with SSL connection...";
	}
};

class SSLBridge
{

protected:
	boost::shared_ptr<ip::tcp::socket> clientSocket;
	ip::tcp::socket *serverSocket;
	std::string serverName;

	bool closed;

	SSL *serverSession;
	SSL *clientSession;

	virtual ip::tcp::endpoint getRemoteEndpoint();
	virtual bool readFromClient();

private:
	SessionCache *cache;

	X509* getServerCertificate();
	void buildClientContext(SSL_CTX *context, Certificate *leaf, std::list<Certificate*> *chain);
	int isAvailable(int revents);
	int isClosed(int revents);
	int forwardData(SSL *from, SSL *to);
	void setServerName();
	bool readFromServer();

public:

	SSLBridge(boost::shared_ptr<ip::tcp::socket> clientSocket,
	          ip::tcp::socket *serverSocket)
		: clientSocket(clientSocket), serverSocket(serverSocket),
		  serverSession(), clientSession(), closed(false)
	{
		cache = SessionCache::getInstance();
	}

	~SSLBridge()
	{
		close();
	}

	void handshakeWithClient(CertificateManager &manager, bool wildcardOK);
	void handshakeWithServer();
	void shuttleData();
	virtual void close();
};



#endif
